Temper-screw.



F. W. LElDECKER.

TEMPER SCREW.

ICATION FILED AUG.2T. 1914.

FRANK W. LEIDECKER, OF MARIETTA, OHIO.

TEMPER-SCREW.

Specification of Letters Patent.

Patented Hot. 26, 1915.

Application filed August 2'7, 1914. Serial No. 858,939.

T all whom it may concern:

Be it known that I, FRANK W. LEmnoKER, a citizen of the United States, residing at Marietta, in the county of Washington and State of Ohio, have invented a new and useful Temper-Screw, of which the following is a specification.

The present invention relates to improvements in temper screws.

One object of the present invention, is the provision of a temper screw having a novel form of yoke construction whereby the threaded jaws of the temper reins are positively locked in engagement with the main screw of said temper screw and whereby the same are automatically released as the screw is released.

In the present practice, much difiiculty is experienced in maintaining the proper tension upon the threaded jaws of the temper screw reins because of the constant tendency of the yoke screw to back out or unscrew, due to the violent vibrations imparted to the temper screw during the drilling operation. Existing devices designed to overcome this difliculty have proven unsatisfactory because those that effectively lock the jaws of the temper screw reins in engagement with the main screw, when the yoke screw has been placed in locked position, also look or clamp the yoke screw when it has been rotatably unscrewed to release the jaws of the temper screw reins, thereby rendering the manipulation of the yoke screw very difficult and laborious, also necessitating the loss of considerable time because of the objectionable looking or clamping of the yoke screw after it has been unscrewed, it requiring a blow from a hammer or the like to release the same.

The present invention aims to obviate the above defect by providing not only locking means for the yoke screw when it is in locked position, but also to insure the automatic releasing or unlocking of the yoke screw when it has been rotated or unscrewed to release the jaws of the temper screw.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de* scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings-Figure 1 is a view showmg the present invention in use. Fig. 2 is across section taken on line 22 of Fig. 1 upon an enlarged scale. Fig. 3 is a vertical cross section taken on line 3-3 of Fig. 2. Fig. 4: is a section taken on line 4 -4 of Fig. 3.

Referring to the drawings, the numeral 5 designates the reins and 66 the screw engaging members thereof, the yoke 7 being constructed as is usual to surround the same and being provided with the split screw 9 which secures said yoke to the jaw 6. By providing the split screw, the yoke is properly secured in place and the resiliency of the split screw prevents the jarring during the reciprocation of the present device from loosening the same.

A boss 10 having a tapered smooth bored portion 11 terminating in the cylindrical bore 12 is formed with the yoke 7 at one side thereof, and is at a point diametrically opposite to the screw 9, the aperture 13 being provided for the sliding reception of the screw 14 which, as shown in Fig. 3, threadedly engages the bore 15 of the frusto-conical wedging member 16 mounted in the frusto-conical bore 11 of the member 10. The member 16 is slotted as at 17 and separated as at 17, the longitudinal recess 17 being provided for the reception of the pin 18 carried by the member 10, thus permitting longitudinal movement of the member 16, but preventing the rotation thereof.

It will thus be seen that by rotating the screw 14 through the handle 19 as usual, to cause the end 20 to engage the jaw 6 that the same will be moved to cooperate with the jaw 6 in engaging the screw 8, and thus at the same time force the frusto-conical member 16 snugly within the tapered bore 11 of the boss 10 against the coiled spring 21 to produce'the desired locking effect upon the screw 14. As the locking of this member often prevents the easy removal of the screw 14 when it is desired to rotate the same in the opposite direction to release the jaws 6 and 6, and as a wedging member has been heretofore employed, it has been necessary to mount it so that the outer face adjacent the handle 19 is accessible for receiving a hammer or other instrument to release the same, and therefore to overcome this, the coiled. spring 21 is seated within the cylindrical bore 12, so as to exert a tension against the member 16. By this means when the screw 14 is rotated to release position, the spring 21 is also released and pushes the member 16 outwardly of the bore 11, thus. releasing it so that the screw 14 is readily manipulated.

The frusto-conical member 16, asv clearly shown in Fig. 4, is split at 17, While the external slot 17 permits it to properly expand and contract, due to the movement of the screw 1 1 and the effect of the spring 21 thereon, thus producing the desired looking and-releasing effect on the screw as. the member 16 is movedinto and out of the recess or bore 11.

What is claimed is:

1. The combination with the reins. and their: jaws of: a well drilling; machine, of a temper screw, including yoke attached to and carried" by one jaw and surrounding both jaws, a screw mounted therein formovement; to and from one jaw, a resilient locking member disposed for longitudinal movement and in cooperative relation to the yoke and the screw, and a. spring exerting a tension upon the locking member for releasing the same when the screw is rotated to release position.

2, The combination with the reins and their jaws of a well drilling machine, of a temper screw, including a yoke attached to and carried by one jaw and surrounding both jaws, a screw mounted therein for movement to and from one jaw, a resilient locking member disposed for longitudinal movement and in cooperative relation to the yoke and the screw. a spring exerting a tension upon the locking member for releasing the same as the screw is rotated to release position, and means for permitting longitudinal movement and for preventing rotary movement of the locking member.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

FRANK W. LEIDECKER. Witnesses:

W. E. SYKEs, A. P. THOMAS.

12 65, Oi 11bit: patent may e obta ned for five cents each, by addressing the Commissioner of Patents, Washington, 1), 0.. 

